The comet might be visible to the naked eye in the daytime next month. For now, observers will need some help spotting it.

Comet C/2025 A6 (Lemmon), captured from the Dark Sky Alqueva Observatory in Portugal on October 2, 2025, glows green as it nears its closest approach to Earth. Here’s how to see this rare green comet ...

A newly discovered comet is rapidly brightening and could become visible from Earth — if it survives an extreme close encounter with the sun on April 4.

Astronomy enthusiasts have a rare opportunity to witness Comet Lemmon (C/2025 A6) in the night sky this Sunday, October 26, before it disappears for more than a millennium. Alongside it, the dimmer ...